Recent content by MohammadG

Homework Statement Hey, For an assignment I need to derive the optimal angle for maximum range (derive Equation 2 below). I know how to derive equation 1 but I need to derive the second equation so I can substitute h = 0, and h = 1, into it, to show the optimal angle for maximum range for...

Thanks for your help. I still don't understand how you worked out Q3 though. I get f = 1 /2 pi r / v, :/ Wikipedia says ω = 2πf is the angular frequency, is that what I want? The way I tried to do it was: T = 2pi r / v, and f = 1/T, So just replace T with 2pir /v, to get my formula...

I need these Questions answers in 2 hours! :p Any help would be greatly appreciated. Homework Statement Question 3 Mathematically derive a relationship between the speed v, of a body moving in a circle of radius r, and the frequency f, of the revolutions. Question 4 Use your results...

That helped a bit but I'm looking for more history. I'm assuming Newton had something to with it as he invented the word centripetal. I can't find anything online though.

Anyone know how the theory of Uniform Circular Motion was discovered? I know Newton invented the word "centripetus", Latin for Centripetal but that's about it. I can find history on the pendulum but nothing for uniform circular motion. Could you give me some names? Or links to some...

When you take an extra digit or two at the end of your answer and use that in your calculation you final answer should be accurate. You can then round off this answer to the necessary significant figures. Using a rounded answer will give you a different result most of the time.

Homework Statement Derive a relationship between the speed v, of a body moving in a circle of radius r, and the frequency f, of the revolutions. Homework Equations v=2πr/T T=1/F The Attempt at a Solution Well, I thought this would be as simple as solving for F in the second...

Yes speed should remain constant.

Homework Statement The Bohr model of the hydrogem atom has one electron rotating around its center. If it has a radius of 5.29 * 10-11 m. And the mass of the electron is : 9.11 * 10-31. And the electrostatic force between the orbiting electron and the center proton is 8.20 * 10-8. Find: 1)...

Both x and y. However as the horizontal component won't change, we can just use the vertical component correct? As both have the same trajectory.

Homework Statement A package of supplies is dropped from a plane and one second later a second package is dropped. Neglecting air resistance, the distance between the falling packages will: A) Be constant B) decrease C) increase D) depend on their weight Homework Equations Sv=1/2 av t^2 The...

After interpolating the graph again I got a more acceptable answer of -270. Which is 5 degrees off absolute zero. I've also used the approximately equal sign in my final calculation. Thank again!

Cepheid, Thanks you so much for your continued support! I've managed to make an approximate equation for the graph. My slope ended up being 0.32. I've also answered question 4 and have gotten an answer of V= -250 when T = 0. Which is appropriate. One last question, as the tick mark method...

I must be missing something then. Sorry! m = y2 - y1/x2-x1 or rise/run But I have no points besides (0, 80)? The slope seems to be something like 0.4(cubic metres per degree celsius) visually. What other way is there of finding the slope? Sorry again if I'm missing something obvious.

Okay I see how you go that. No slope was given in the data and there is no way of determining what other points lie on the line. So the only expression I can produce (without having slope) would be: V = mT + 80, correct? So for question 4, what would be the value of T when V = 0? Would...